Load side voltage sensing for AMI metrology

ABSTRACT

Disclosed are apparatus and methodology subject matters for providing improved functionality of a meter in a 2-way communications arrangement, such as an Advanced Metering System (AMS) or Infrastructure (AMI). More particularly, the present technology relates to methodologies and apparatus for providing load side voltage sensing for utility meters which preferably are operable with remote disconnect features in an Advanced Metering Infrastructure (AMI) open operational framework. The present subject matter provides enhanced capabilities resulting in improved functionality, increased safety, and greater economy vis-à-vis fraud detection for individual metrology components in an open operational framework. Meters per the present subject matter utilize a detection circuit, which is situated generally downstream of a remote disconnect functionality. Such detection circuit is able to sense whether voltage exists or doesn&#39;t exist at such relatively downstream, or load side location. Providing such functionality allows for: (a) verification that a remote disconnect switch did open subsequent to an instruction or command to do so, (b) identification of possible user fraud, as would possibly be reflected by the presence of voltage at a time when the remote disconnect switch is open, (c) verification that the remote disconnect switch did re-close after having been given an instruction or command to close, and (d) verification of lack of voltage present before re-closing such remote disconnect switch, which serves an important safety feature.

PRIORITY CLAIM

This application claims the benefit of previously filed U.S. ProvisionalPatent Application entitled “LOAD SIDE VOLTAGE SENSING FOR AMIMETROLOGY,” assigned U.S. Ser. No. 60/842,269, filed Sep. 5, 2006, andwhich is hereby incorporated herein by reference in its entirety for allpurposes.

FIELD OF THE INVENTION

The present technology relates to utility meters. More particularly, thepresent technology relates to methodologies and apparatus for providingload side voltage sensing for utility meters which preferably areoperable with remote disconnect features in an Advanced MeteringInfrastructure (AMI) open operational framework.

BACKGROUND OF THE INVENTION

The general object of metrology is to monitor one or more selectedphysical phenomena to permit a record of monitored events. Such basicpurpose of metrology can be applied to a variety of metering devicesused in a number of contexts. One broad area of measurement relates, forexample, to utility meters. Such role may also specifically include, insuch context, the monitoring of the consumption or production of avariety of forms of energy or other commodities, for example, includingbut not limited to, electricity, water, gas, or oil.

More particularly concerning electricity meters, mechanical forms ofregisters have been historically used for outputting accumulatedelectricity consumption data. Such an approach provided a relativelydependable field device, especially for the basic or relatively lowerlevel task of simply monitoring accumulated kilowatt-hour consumption.

The foregoing basic mechanical form of register was typically limited inits mode of output, so that only a very basic or lower level metrologyfunction was achieved. Subsequently, electronic forms of metrologydevices began to be introduced, to permit relatively higher levels ofmonitoring, involving different forms and modes of data.

In the context of electricity meters specifically, for a variety ofmanagement and billing purposes, it became desirable to obtain usagedata beyond the basic kilowatt-hour consumption readings available withmany electricity meters. For example, additional desired data includedrate of electricity consumption, or date and time of consumption(so-called “time of use” data). Solid state devices provided on printedcircuit boards, for example, utilizing programmable integrated circuitcomponents, have provided effective tools for implementing many of suchhigher level monitoring functions desired in the electricity metercontext.

In addition to the beneficial introduction of electronic forms ofmetrology, a variety of electronic registers have been introduced withcertain advantages. Still further, other forms of data output have beenintroduced and are beneficial for certain applications, including wiredtransmissions, data output via radio frequency transmission, pulseoutput of data, and telephone line connection via such as modems orcellular linkups.

The advent of such variety and alternatives has often required utilitycompanies to make choices about which technologies to utilize. Suchchoices have from time to time been made based on philosophical pointsand preferences and/or based on practical points such as, training andfamiliarity of field personnel with specific designs.

Another aspect of the progression of technology in such area ofmetrology is that various retrofit arrangements have been instituted.For example, some attempts have been made to provide basic meteringdevices with selected more advanced features without having tocompletely change or replace the basic meter in the field. For example,attempts have been made to outfit a basically mechanical metering devicewith electronic output of data, such as for facilitating radio telemetrylinkages.

Another aspect of the electricity meter industry is that utilitycompanies have large-scale requirements, sometimes involving literallyhundreds of thousands of individual meter installations, or data points.Implementing incremental changes in technology, such as retrofitting newfeatures into existing equipment, or attempting to implement changes tobasic components which make various components not interchangeable withother configurations already in the field, can generate considerableindustry problems.

Electricity meters typically include input circuitry for receivingvoltage and current signals at the electrical service. Input circuitryof whatever type or specific design for receiving the electrical servicecurrent signals is referred to herein generally as current acquisitioncircuitry, while input circuitry of whatever type or design forreceiving the electrical service voltage signals is referred to hereingenerally as voltage acquisition circuitry.

Electricity meter input circuitry may be provided with capabilities ofmonitoring one or more phases, depending on whether monitoring is to beprovided in a single or multiphase environment. Moreover, it isdesirable that selectively configurable circuitry may be provided so asto enable the provision of new, alternative or upgraded services orprocessing capabilities within an existing metering device. Suchvariations in desired monitoring environments or capabilities, however,lead to the requirement that a number of different metrologyconfigurations be devised to accommodate the number of phases requiredor desired to be monitored or to provide alternative, additional orupgraded processing capability within a utility meter.

More recently a new ANSI protocol, ANSI C12.22, is being developed thatmay be used to permit open protocol communications among metrologydevices from various manufacturers. C12.22 is the designation of thelatest subclass of the ANSI C12.xx family of Meter Communication andData standards presently under development. Presently defined standardsinclude ANSI C12.18 relating to protocol specifications for Type 2optical ports; ANSI C12.19 relating to Utility industry Meter Data Tabledefinitions; and ANSI C12.21 relating to Plain Old Telephone Service(POTS) transport of C12.19 Data Tables definition. It should beappreciated that while the remainder of the present discussion maydescribe C12.22 as a standard protocol, that, at least at the time offiling the present application, such protocol is still being developedso that the present disclosure is actually intended to describe an openprotocol that may be used as a communications protocol for networkedmetrology and is referred to for discussion purposes as the C12.22standard or C12.22 protocol.

C12.22 is an application layer protocol that provides for the transportof C12.19 data tables over any network medium. Current standards for theC12.22 protocol include: authentication and encryption features;addressing methodology providing unique identifiers for corporate,communication, and end device entities; self describing data models; andmessage routing over heterogeneous networks.

Much as HTTP protocol provides for a common application layer for webbrowsers, C12.22 provides for a common application layer for meteringdevices. Benefits of using such a standard include the provision of: amethodology for both session and session-less communications; commondata encryption and security; a common addressing mechanism for use overboth proprietary and non-proprietary network mediums; interoperabilityamong metering devices within a common communication environment; systemintegration with third-party devices through common interfaces andgateway abstraction; both 2-way and 1-way communications with enddevices; and enhanced security, reliability and speed for transferringmeter data over heterogeneous networks.

To understand why utilities are keenly interested in open protocolcommunications; consider the process and ease of sending e-mails from alaptop computer or a smart phone. Internet providers depend on the useof open protocols to provide e-mail service. E-mails are sent andreceived as long as e-mail addresses are valid, mailboxes are not full,and communication paths are functional. Most e-mail users have theoption of choosing among several Internet providers and severaltechnologies, from dial-up to cellular to broadband, depending mostly onthe cost, speed, and mobility. The e-mail addresses are in a commonformat, and the protocols call for the e-mail to be carried bycommunication carriers without changing the e-mail. The open protocollaid out in the ANSI C.12.22 standard provides the same opportunity formeter communications over networks.

One function previously known has been to integrally incorporate a wholeservice disconnection device with a meter. Such a feature or function,known also as “remote disconnect,” allows the entire electrical serviceto be switched off at a location where the remote disconnect switch (ormeter with integral remote disconnect function) is installed.

In general, it may be possible to variously communicate instructions tosuch remote disconnect switch (whether such comprises an independentdevice or one integrally provided in conjunction with a meter). Forexample, there are so-called 2-way communications linkages which couldoffer such communication ability. The above-referenced Advanced MeteringInfrastructure (AMI) environment would also generally provide suchcommunication ability, though it is to be understood that 2-waycommunications are not the same as an AMI environment, per se.

In general, 2-way communications involve technology that supportsbi-directional communications, and may involve an endpoint device suchas a meter. Typical attributes in such circumstances are that there isgenerally high data collection reliability, the ability to obtainregister reads generally on demand, and the ability to perform a demandreset, as well as the above-mentioned remote disconnect (and re-connect)functionality. AMI can generally provide such attributes as typicallyassociated with a communications link as well as provide what may bethought of (in a metering context) as integral demand response, such asload control and verification, critical Peak Pricing management,consumer access, 3rd party devices certified on network, and otherAdvanced Metering functionality (now or later developed). So, generallyspeaking, AMI typically involves 2-way communications but not all 2-waycommunications involve or support AMI functionality.

In addition, the desire for increased processing capabilities as well asother considerations including, but not limited to, a desire to provideenhanced capabilities resulting in improved functionality, increasedsafety, and greater economy vis-à-vis fraud detection for individualmetrology components in an open operational framework, leads torequirements for interfacing such components with system applications.

As such, it is desired to provide an improved interface for couplingutility meters to their respective load side environment, as well astheir system applications in an open operational framework.

While various aspects and alternative embodiments may be known in thefield of utility metering, no one design has emerged that generallyencompasses the above-referenced characteristics and other desirablefeatures associated with utility metering technology as hereinpresented.

SUMMARY OF THE INVENTION

In view of the recognized features encountered in the prior art andaddressed by the present subject matter, improved apparatus andmethodologies of metrology devices in an open operational frameworkvis-à-vis their load side environment have been provided.

In exemplary arrangements, methodologies and apparatus have beenprovided to permit transmission of operational data and informationbetween a utility meter and an operational application through anetwork.

In one of its simpler forms, the present technology providesmethodologies and apparatus for interface between operational data andcontrol via a network and meters operatively associated with suchnetwork.

One positive aspect of such interface is that it functions to provideenhanced capabilities resulting in improved functionality based on loadside environment data at each respective meter operatively associatedwith such network.

Another positive aspect of such interface is that it functions toprovide enhanced and/or increased safety capabilities resulting inimproved functionality based on load side environment data at eachrespective meter operatively associated with such network.

Yet another positive aspect of such interface is that it functions toprovide greater economy vis-à-vis enhanced and/or increased frauddetection capabilities resulting in improved functionality based on loadside environment data at each respective meter operatively associatedwith such network.

In further present exemplary aspects, there is the provision preferablyof a detection circuit, situated downstream of a remote disconnectswitching functionality, and by which so-called “load side” voltage maybe sense. In such fashion, the present technology advantageously permitsverification that the disconnect function was operative after anappropriate instruction, and alternately that a re-connect functionalitywas operative after an appropriate instruction.

In still additional exemplary aspects, the utilization of such detectionfunctionality (in conjunction with other present subject matter), wouldpermit the detection of possible fraud, based on the presence of aload-side voltage after a disconnect switching functionality had beenoperative. Because the economic losses of any fraud eventually are borneby all legitimate consumers, the present subject matter advantageouslycontributes to greater economy of operation to the extent that it canhelp deter and/or detect such fraud.

Yet further exemplary aspects of the present technology may relate toenhanced and/or increased safety capabilities. More specifically,verification of lack of a voltage before a switch is closed and serviceis re-connected could help prevent an equipment-damaging out-of-phasecondition (regardless of whether the voltage is there improperly orlegitimately, for example, legally shared from a neighbor's house).Again, any safety issue which is a threat to equipment can ultimatelybecome a threat to the safety of persons, so the present subject matteradvantageously contributes to greater safety of operation to the extentthat it can help detect or prevent such potentially unsafe operatingconditions.

One present exemplary embodiment relates to an electricity meter for usewithin an advanced metering system having and operating relative to anetwork, other meters, user interfaces, and central collectionfunctionality. Such an exemplary meter preferably comprises a line sidewhich receives electrical service when connected to such meter; a loadside, downstream from the meter line side, which electrically connectswith an electrical load when connected to such meter; a detectioncircuit, upstream from the meter load side and downstream from the meterline side, for detecting the presence of electricity at the meter loadside; a remote disconnect switch, upstream from the detection circuitand downstream from the meter line side, controllably actuated forelectrically connecting and disconnecting the meter line side relativeto the meter load side, so that electrical service when present at themeter line side is, respectively, electrically connected with, anddisconnected from, an electrical load when present at the meter loadside; metrology, downstream from the meter line side and upstream fromthe meter load side, for monitoring the consumption or production ofelectricity vis-à-vis electrical service and electrical load associatedwith such meter; and a bi-directional communications link, linking suchmeter and a network operating relative to an advanced metering system.With such an exemplary arrangement, data may be communicated regardingactuation of the remote disconnect switch and presence of electricity atthe meter load side.

In various alternative embodiments of the foregoing present exemplarysubject matter, such detection circuit may comprise a voltage sensorelectrically in parallel with the meter load side, while the metrologymay include current acquisition circuitry for receiving electricalservice current signals, and voltage acquisition circuitry for receivingelectrical service voltage signals.

In yet other present alternative arrangements, the bidirectionalcommunications link may preferably include at least one communicationsmodule configured to effect bi-directional communications between themeter and other networked devices using an open standard metercommunication protocol. In some of such alternatives, the at least onecommunications module may include one of an additional circuit boarddedicated to WAN connectivity and one or more of GPRS, Ethernet, and RFLAN communications modules.

Other present exemplary embodiments are more related to an advancedmetering system with added functionality based on meter load sidesensing. One such exemplary present system may comprise a plurality ofend devices, and a network including central collection functionality,and configured for bi-directional communications between the centralcollection functionality and each of such plurality of end devices.

In such foregoing exemplary system arrangement, at least some of suchend devices may comprise electricity meters, each of such electricitymeters having a line side for receiving electrical service; a load side,downstream from the meter line side, for electrically connecting with anelectrical load; a detection circuit, upstream from the meter load sideand downstream from the meter line side, for detecting the presence ofelectricity at the meter load side; a remote disconnect switch, upstreamfrom the detection circuit and downstream from the meter line side, forcontrollably actuating for electrically connecting and disconnecting themeter line side relative to the meter load side, so that electricalservice when present at the meter line side is, respectively,electrically connected with, and disconnected from, an electrical loadwhen present at the meter load side; and metrology, downstream from themeter line side and upstream from the meter load side, for monitoringthe consumption or production of electricity vis-à-vis electricalservice and electrical load associated with the meter. Further in suchexemplary alternatives, with inclusion of such a network and relatedcentral collection functionality, data may be communicated across thenetwork regarding actuation of the remote disconnect switch of anelectricity meter and presence of electricity at the meter load sidethereof.

In some other present exemplary alternatives of the foregoingarrangements, selected of the plurality of end devices may alternativelybe configured to relay bi-directional communications between the centralcollection functionality and others of the plurality of end devices;while the network may further include at least one cell relay, with thebi-directional communication between the central collectionfunctionality and selected of such plurality of end devices passingthrough the at least one cell relay. In such exemplary alternatives,bi-directional communication between the central collectionfunctionality and selected of such plurality of end devices is conductedby way of the cell relay while bi-directional communication between thecentral collection functionality and others of the plurality of enddevices is conducted directly.

In other of the foregoing alternatives, such network may be configuredfor bi-directional communications so as to include using an openstandard meter communication protocol.

It is still to be understood by those of ordinary skill in the art thatthe present subject matter may equally relate to various methodologies,one present example of which relates to a methodology for improvedfunctionality of an electricity meter used within an advanced meteringsystem having and operating relative to a network, other meters, userinterfaces, and central collection functionality. Such present exemplarypreferably may comprise providing an electricity meter having a lineside for receiving electrical service; a load side, downstream from themeter line side, for electrically connecting with an electrical load; adetection circuit, upstream from the meter load side and downstream fromthe meter line side, for detecting the presence of electricity at themeter load side; a remote disconnect switch, upstream from the detectioncircuit and downstream from the meter line side, for controllablyactuating for electrically connecting and disconnecting the meter lineside relative to the meter load side, so that electrical service whenpresent at the meter line side is, respectively, electrically connectedwith, and disconnected from, an electrical load when present at themeter load side; metrology, downstream from the meter line side andupstream from the meter load side, for monitoring the consumption orproduction of electricity vis-à-vis electrical service and electricalload associated with the meter; and a bidirectional communications link,linking the meter and a network operating relative to an advancedmetering system. Such present exemplary may further include connectingelectrical service to the meter line side; and connecting an electricalload to the meter load side, such that data may be communicated acrossthe network regarding actuation of the remote disconnect switch andpresence of electricity at the meter load side.

In present exemplary variations of such present methodology, a givenmethod may further comprise actuating the remote disconnect switch so asto electrically disconnect the meter line side relative to the meterload side; and subsequently verifying that the remote disconnect switchelectrically disconnected the meter line side relative to the meter loadside. Other present variations may further comprise subsequent toverifying that the remote disconnect switch electrically disconnectedthe meter line side relative to the meter load side, actuating theremote disconnect switch so as to electrically re-connect the meter lineside relative to the meter load side.

Still other present alternative methodologies may further compriseactuating the remote disconnect switch so as to electrically connect themeter line side relative to the meter load side; and subsequentlyverifying that the remote disconnect switch electrically connected themeter line side relative to the meter load side. As presently discussedhereinbelow, still further variations of the foregoing methodology maybe practiced.

Still further, other present exemplary methodology embodiments may morerelate to methodology for an advanced metering system with addedfunctionality based on meter load side sensing. One exemplary suchmethodology may comprise providing a plurality of end devices, at leastsome of which end devices comprise electricity meters, each of suchelectricity meters having a line side for receiving electrical service;a load side, downstream from the meter line side, for electricallyconnecting with an electrical load; a detection circuit, upstream fromthe meter load side and downstream from the meter line side, fordetecting the presence of electricity at the meter load side; a remotedisconnect switch, upstream from the detection circuit and downstreamfrom the meter line side, for controllably actuating for electricallyconnecting and disconnecting the meter line side relative to the meterload side, so that electrical service when present at the meter lineside is, respectively, electrically connected with, and disconnectedfrom, an electrical load when present at the meter load side; andmetrology, downstream from the meter line side and upstream from themeter load side, for monitoring the consumption or production ofelectricity vis-à-vis electrical service and electrical load associatedwith the meter; providing a network including central collectionfunctionality; configuring the network for bi-directional communicationsbetween the central collection functionality and each of the pluralityof end devices; connecting electrical service to the meter line side ofat least one of such electricity meters; and connecting an electricalload to the meter load side of such at least one electricity meter, suchthat data may be communicated across the network regarding actuation ofthe remote disconnect switch thereof and presence of electricity at themeter load side thereof.

In various present alternatives of the foregoing methodology for anadvanced metering system, each detection circuit of an electricity metercomprises a voltage sensor electrically in parallel with the meter loadside, such detection circuit including a filtering capacitor, anover-current protection resistor, an opto-isolator, and a transientvoltage suppressor for setting the turn-on voltage of the voltagesensor; the metrology of each electricity meter includes currentacquisition circuitry for receiving electrical service current signals,and voltage acquisition circuitry for receiving electrical servicevoltage signals, with such current acquisition circuitry and voltageacquisition circuitry configured for receiving multi-phase electricalservice current and voltage signals, respectively, and such metrology isconfigured for correction of any monitoring offset relative toelectrical service caused by the presence of the detection circuit insuch electricity meter; and each electricity meter includes at least onecommunications module configured to effect bi-directional communicationsbetween the meter and other networked devices using an open standardmeter communication protocol, with such at least one communicationsmodule including an additional circuit board dedicated to WANconnectivity, or one or more of GPRS, Ethernet, and RF LANcommunications modules.

Additional objects and advantages of the present subject matter are setforth in, or will be apparent to, those of ordinary skill in the artfrom the detailed description herein. Also, it should be furtherappreciated that modifications and variations to the specificallyillustrated, referred and discussed features, elements, and steps hereofmay be practiced in various embodiments and uses of the present subjectmatter without departing from the spirit and scope of the subjectmatter. Variations may include, but are not limited to, substitution ofequivalent means, features, or steps for those illustrated, referenced,or discussed, and the functional, operational, or positional reversal ofvarious parts, features, steps, or the like.

Still further, it is to be understood that different embodiments, aswell as different presently preferred embodiments, of the presentsubject matter may include various combinations or configurations ofpresently disclosed features, steps, or elements, or their equivalentsincluding combinations of features, parts, or steps or configurationsthereof not expressly shown in the figures or stated in the detaileddescription of such figures. Additional embodiments of the presentsubject matter, not necessarily expressed in the summarized section, mayinclude and incorporate various combinations of aspects of features,components, or steps referenced in the summarized objects above, and/orother features, components, or steps as otherwise discussed in thisapplication. Those of ordinary skill in the art will better appreciatethe features and aspects of such embodiments, and others, upon review ofthe remainder of the specification.

BRIEF DESCRIPTION OF THE DRAWINGS

A full and enabling disclosure of the present subject matter, includingthe best mode thereof, directed to one of ordinary skill in the art, isset forth in the specification, which makes reference to the appendedfigures, in which:

FIG. 1 is a block diagram overview illustration of an exemplary AdvancedMetering System (AMS) or Infrastructure (AMI) deployment incorporatingvarious of both apparatus and methodology aspects of the present subjectmatter;

FIG. 2 illustrates for further background discussion purposes a blockdiagram of an exemplary watthour meter incorporating features inaccordance with present ANSI watthour meter configuration standards;

FIG. 3 illustrates for further background discussion purposes a blockdiagram of an exemplary watthour meter incorporating features inaccordance with an alternative arrangement of an exemplary watthourmeter configuration; and

FIG. 4 illustrates for further disclosure purposes relating to presentsubject matter a block diagram of an exemplary watthour meterincorporating features in accordance with present ANSI watthour meterconfiguration standards, incorporating remote disconnect features, andfurther incorporating subject matter of the presently disclosedtechnology relative to load side voltage sensing and related presentfeatures.

Repeat use of reference characters throughout the present specificationand appended drawings is intended to represent same or analogousfeatures, elements, or steps of the present subject matter.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

As discussed in the Summary of the Invention section, the presentsubject matter is particularly concerned with the provision of improvedcorresponding apparatus and methodologies allowing enhancedfunctionality of metrology devices in an open operational framework.More particularly, the present technology relates to methodologies andapparatus for providing load side voltage sensing for utility meterswhich preferably are operable with remote disconnect features in anAdvanced Metering Infrastructure (AMI) open operational framework.

Selected combinations of aspects of the disclosed technology correspondto a plurality of different embodiments of the present subject matter.It should be noted that each of the exemplary embodiments presented anddiscussed herein should not insinuate limitations of the present subjectmatter. Features or steps illustrated or described as part of oneembodiment may be used in combination with aspects of another embodimentto yield yet further embodiments. Additionally, certain features may beinterchanged with similar devices or features not expressly mentionedwhich perform the same or similar function.

Reference will now be made in detail to presently preferred embodimentsof the subject methodologies and apparatus. Referring to the drawings,FIG. 1 is a block diagram overview illustration of an exemplary AdvancedMetering System (AMS) or Infrastructure (AMI) deployment 100 generallyin accordance with the present subject matter incorporating various ofboth apparatus and methodology aspects of the present subject matter.

Advanced Metering System (AMS) 100 in pertinent part is preferablydesigned and built around industry standard protocols and transports,and therefore is intended to work with standards compliant componentsfrom third parties. In other words, AMS 100 is configured to betransparent in a transportation context, such that the exemplaryrespective meters may be interrogated (such as using representativeCollection Engine generally 190) regardless of what networkinfrastructure exists inbetween or among such components. Moreover, dueto such transparency, the respective meters preferably may also respondto Collection Engine 190 in the same manner. Preferably, as intended tobe represented by the illustration in FIG. 1, Collection Engine 190 iscapable of integrating Radio, PLC (Power Line Communications), and IP(Internet Protocol) connected meters, details of which communicationsform no particular aspects of the present subject matter.

In general, it is preferred that the system represented in present FIG.1 provides full two-way messaging to every device. For example, therespectively represented meter devices may be variously configured toprovide differing communications capabilities. In exemplaryconfigurations, one or more of GPRS, Ethernet, and RF LAN communicationsmodules may be provided. GPRS will allow meters to be IP addressableover a public backhaul and provide more bandwidth than the meter willlikely ever require, but may incur ongoing subscription costs. Ethernetconnectivity can be used to bridge to third party technologies,including WiFi, WiMax, in-home gateways, and BPL (Broadband over PowerLines), without integrating any of these technologies directly into themetering device, but with the tradeoff of requiring external wiring anda two part solution. Ethernet devices may be used primarily in pilotsand other special applications, and they additionally may be ideal forcertain high-density RF-intolerant environments, such as meter closets.Due to the increased complexity of managing certain interfaces, forexample, such as a WAN interface, with its more sophisticated linknegotiation requirements and TCP/IP (Transmission ControlProtocol/Internet Protocol) stack, WAN connected meters may include anadditional circuit board dedicated to WAN connectivity. All suchalternative and exemplary supporting boards, if required, are consideredto be part of preferred embodiments that sense and communicate controland information data in accordance with the present subject matter,whether using ANSI standard C12.22 communications protocol or otherwise.

Also, as discussed in greater detail herein, it is to be understood thatthe representative exemplary meter devices of present FIG. 1 areintended to represent meter devices associated respectively with remotedisconnect (and re-connect) functionality, as well as other presentfeatures relative to load side voltage sensing and related features.

Communication with the Collection Engine 190 is preferably performedover an Internet Protocol connection, represented by such connection192. The Wide-Area-Network is a fully routable, addressable, IP networkthat may involve a variety of different technologies including, but notlimited to, GPRS, WiFi, WiMax, Fiber, Private Ethernet, BPL, or anyother connection with sufficiently high bandwidth and ability to supportfull two-way IP communication. Several assumptions (that is, criteria ofthe present subject matter) may be made regarding the IP WAN. CollectionEngine 190 is preferably implemented so as to be able to communicatedirectly with other respective nodes on the IP WAN. While communicationsmay be conducted through a firewall 194, it is not necessary that suchbe proxied, unless the proxy is itself a C12.22 node functioning as arelay between a private IP network and the public IP WAN.

The Advanced Metering System as used in conjunction with the presenttechnology provides a series (or plurality) of services(functionalities) to utilities. Beyond its most basic implementation(daily feeds of residential interval or TOU (Time of Use) data), it mayprovide power outage and restoration notifications, on-demand readings,firmware updates, load control/demand response, gas meter readings, andin-home display messages. All of such functions (services) may bepreferably communicated via the ANSI standard C12.22 protocol.

With further reference to present reference to FIG. 1, it will be seenthat an exemplary Advanced Metering System (AMS) generally 100deployment has been illustrated for exemplary purposes only with asingle RF LAN cell, with twelve respective exemplary member nodesorganized into three levels, as well as four directly connected IPmeters 170, 172, 174, and 176. In such exemplary arrangement of a systemin conjunction with which the present subject matter may be practiced,all respective meter devices 110, 120, 130, 132, 140, 142, 150, 152,154, 156, 160, 162, 164, 166, 170, 172, 174, and 176, Cell Relay 102,and Collection Engine 190, preferably have C12.22 network addresses,with Collection Engine 190 preferably having multiple C12.22 addressesto allow for separate addressing between different services(functionalities). Representative Meter (or Master) Data ManagementSystem 191 is not part of any such C12.22 network, but preferably itwill be implemented so as to communicate over the Utility LAN 192 toCollection Engine 190 via Web Services. Communications between CellRelay 102 and Utility LAN 192 variously involve Public Backhaul 180 andfirewall 194, in a manner as referenced above, as well understood bythose of ordinary skill in the art.

The meter data acquisition process may be processed through operation ofthe Meter (or Master) Data Management System 191, initiating a requestfor such data. Such requests may be sent out either directly to thedevice (in the case of an IP connected meter, such as 170), or to CellRelay 102 that relays the message out to all appropriate nodes. Whilevarious tables per a manufacturer's stored procedure may be used, inresponse to C12.22 stored procedure calls, the various AMS enabledmeters of FIG. 1 are preferably field programmable, via C12.22 tables,as to the type data to be included in any default upload. In any event,response processing can use the configured data about an end device andthe response message from an end device to determine the results fromsuch device. In the instance of the present subject matter, suchoperations allow responses that contain logs from the devices, such asrelating to above-referenced load side sensed voltage data at aparticular installation, all in accordance with the present subjectmatter.

FIG. 2 illustrates for further background discussion purposes a blockdiagram of a representative exemplary watthour meter generally 200incorporating features in accordance with present ANSI watthour meterconfiguration standards. FIG. 3 on the other hand illustrates forfurther background discussion purposes a block diagram of arepresentative exemplary watthour meter generally 300 incorporatingfeatures in accordance with an alternative arrangement of an exemplarywatthour meter configuration.

The following includes a brief discussion relative to power consumptionof a load side voltage detect circuit of an RDS (Remote DisconnectSwitch) enabled meter per present subject matter, and the effectsthereof on accuracy. As referenced in the above “Background” section asa general proposition, with all watt meters, there is essentially avoltage circuit and a current circuit. If each is separately calibrated,in general the watts determined with such arrangement will never beaccurate if watts=V*A cos(theta). The reasoning behind such statement isbecause in the case of a watthour meter design that has the voltmeterportion thereof above (in a supply versus load context) the currentmeter portion thereof, some current is lost in the voltage circuit andthus such current is not measured by the ammeter. Conversely, in thecase of a watthour meter design where the ammeter portion is above thevoltmeter portion (again, in the supply versus load context), there willbe some voltage drop in the ammeter which is not measured by thevoltmeter. Therefore, from a design perspective, some “burden” from thevoltmeter or the ammeter must be intentionally removed from theresulting watt reading.

As well known to those of ordinary skill in the art, all ANSI standardwatthour meters are arranged in the manner of the watthour meter designgenerally 200 as diagrammatically represented in present FIG. 2. Such isthe watthour meter design that has the voltmeter portion generally 210thereof above the current meter portion generally 220 thereof (in asupply generally 230 versus load generally 240 context). Because theburden of the ammeter portion generally 220 is never removed, somecurrent is lost in the voltage circuit generally 210 and thus suchcurrent is not measured by the ammeter generally 220. From an industrystandard perspective, it is generally recognized and understood that (ifunaccounted for) any current coil losses would be paid for by the enduser. Such fact is equally true in the instance of practicing thepresent subject matter with reference to any additional resistancelosses in the contacts and metal conductors, such as copper, associatedwith a remote disconnect switch functionality.

Conversely, in the watthour meter design generally 300 diagrammaticallyrepresented in present FIG. 3, the burden in the voltmeter portiongenerally 210 is not measured, and hence any resulting watt losses wouldbe incurred by the utility supplying service to such meter 300.

FIG. 4 illustrates for further disclosure purposes relating to presentsubject matter a block diagram of an exemplary watthour meter generally400 incorporating features in accordance with present ANSI watthourmeter configuration standards, incorporating remote disconnect featuresgenerally 450, and further incorporating subject matter of the presentlydisclosed technology relative to load side voltage sensing and relatedpresent features. It is also to be understood by those of ordinary skillin the art that the description herewith of an exemplary meter 400 inaccordance with present subject matter is likewise a description of therepresentative meters variously illustrated in present FIG. 1. It isalso to be understood that in some implementations of the presentsubject matter, not all of the meters utilized in a particulararrangement must conform with all or a particular subset of the featurespresently described, as some meters in an arrangement may practice thepresent subject matter while some do not.

The following more particularly describes present subject matter, usingfor example, load side voltage data in conjunction with a meter havingremotely disconnectable service features. In the context of present FIG.4, it is to be understood that the terminology “downstream” meanstowards the load side generally 440 thereof versus the source or lineside generally 430 thereof, which would be “upstream” of the load side440. Because integration of a whole service disconnection device orfeature is not unique to the present subject matter, and details thereofform no particular present aspects of the subject technology, an RDS(Remote Disconnect Switch) device is only generally represented by blockdiagram 450. As such, the present subject matter is intended to beusable in combination with all such types of devices and functionalityand equivalents thereof, whether now or later existing.

In more particular, the present subject matter utilizes a detectioncircuit or means generally 460, which is situated generally downstreamof the RDS 450. Such detection circuit or means 460 has a primarypurpose and/or function of being able to sense whether voltage exists ordoesn't exist at such relatively downstream, or load side location.Providing such functionality allows for the following, all in accordancewith the present subject matter: (a) verification that the RDS 450switch did open subsequent to an instruction or command to do so, (b)identification of possible user fraud, as would possibly be reflected bythe presence of voltage at a time when RDS 450 is open, (c) verificationthat RDS 450 did re-close after having been given an instruction orcommand to close, and (d) verification of lack of voltage present beforere-closing RDS 450, which serves an important safety feature. Suchlatter verification is important as a safety feature because if power isbeing supplied, legally or illegally to the load side generally 440 ofRDS 450, then RDS 450 could close in an out-of-phase condition, which isoften hazardous to any equipment involved. Hazards to equipment have away of subsequently also becoming hazards to persons, whether forexample, through resulting shock or fire conditions.

Other presently advantageous aspects of the present subject matter whichwill be understood by those of ordinary skill in the art is that thepresent exemplary arrangements provide a mechanism for using, forexample, firmware-based correction of the metering offset caused by anyburden of the detection circuit generally 460. Normally such burdenwould be billed to the customer, but the present technologyadvantageously permits such cost to be redirected so as to be born bythe utility. Although such is a relatively very low energy usage, it isnonetheless measurable, and a meter fabricated in accordance with thepresent subject matter will provide a built in correction for such usageburden.

One possible implementation of the present subject matter is to comparethe phase angle of the line side voltage generally 430 to the load sidevoltage 440 (which, of course, under normal disconnect conditions,should not exist). If such compared angle is changing, then the loadside generally 440 is likely powered by a stand-alone generator, whichwould normally mean that there are no fraudulent practices involved.However, if the voltage angles remain synchronized (that is, they arenot changing), then power is coming from a common source, which shouldmean the utility supplying the line or source side generally 430.However, there are at least two possible ways for such utility source tobe involved. One would be from a customer's neighbor (which could belegally obtained or possibly illegally obtained). Another possibilitywould be from some sort of by-pass arrangement (which would be improper,illegal, or fraudulent). Therefore, synchronized voltage angles wouldtypically merit further investigation by the utility to determinewhether there were some improper activities involved.

An idealized (that is, simplified) version of a present exemplaryvoltage detection circuit 460 is shown in FIG. 4. Note that due to itsposition in the meter 400 as represented, it is seen as a parallel load,and is metered the same as any other load would be. The representativecapacitor generally 470 is used to drop 60 Hz voltage. Therepresentative resistor 480 generally is used to prevent over-currentduring surges. The representative LED generally 490 is part of anopto-isolator that prevents line generally 430 and load generally 440from being tied together whenever RDS 450 is opened. There is also a TVS(Transient Voltage Suppressor) generally 492 that sets the turn-onthreshold of the system or circuitry generally 460. A TVS is oftenbasically a form of back to back zener diode, and it is where most ofthe watts loss occurs.

If the meter generally 400 is calibrated so-called closed link (wellknown to one of ordinary skill in the art), then the afore-mentionedload would be metered by the utility, but not by any standard instrumentor equipment (if phantom loaded). Such fact is because the currentflowing in the detection circuit generally 460 is supplied by thevoltage source, the same as the potential sense circuit, and the powersupply (the last 2 elements are not metered by the meter, however, asthey are before the current circuits, as stated above). In such case,the described loss will be calibrated out of the meter at the testpoint, but will show as an offset, which will not be calibrated out.

On the other hand, if the meter is calibrated so-called open link (wellknown to one of ordinary skill in the art), then there will be novoltage across the detection circuit generally 460. Therefore, this isno corresponding current or load. It will not, therefore be sensed byeither the meter generally 400 or any standard instrument or equipment.Such will be an offset in the load curve that is not normalized at suchtest point.

From the foregoing, one of ordinary skill in the art will note animplication of a differential error between open and closed linktesting. Open link ignores the aforementioned loss, while closed linkdoes not. Thought of another way, closed link will always show the meter“slower” (to use the language of the old mechanical meter pictured ashaving a rotating dial, the speed of which reflects the rate ofconsumption of the measured commodity, such as electricity).

In view of all the foregoing, including present industry practices withrespect to burden shifting, one preferred manner of practicing thepresent subject matter would be to calibrate per the so-called closedlink approach. In such circumstances, the following error data andcorresponding calculations would be applicable:

Amount of error: This is 0.3 W.

240V, 30 A, we are looking at 7200 W for an error of 0.004% fast

240V, 2 A (ANSI lower limit), 480 W or 0.06% fast

240V, 2 mA, we are looking at 4.8 watts or an error of 6.25% fast

It should be appreciated that such results appropriately correlate withreasoned expectations, as there is more power delivered to the meterthan a customer is actually consuming. All of the delivered power ismetered; therefore, the meter resultingly shows “fast” (using the“rotation” connotations above with reference to metering terminology).Therefore, meters tested on closed link devices (for example, such as aso-called RFL produced now by Radian Research) will show results at thelow end which are regarded as being fast, but will show results whichare correct (if all other factors are equal) if tested on open linkequipment.

While the present subject matter has been described in detail withrespect to specific embodiments thereof, it will be appreciated thatthose skilled in the art, upon attaining an understanding of theforegoing may readily produce alterations to, variations of, andequivalents to such embodiments. Accordingly, the scope of the presentdisclosure is by way of example rather than by way of limitation, andthe subject disclosure does not preclude inclusion of suchmodifications, variations and/or additions to the present subject matteras would be readily apparent to one of ordinary skill in the art.

1. An electricity meter for use within an advanced metering systemhaving and operating relative to a network, other meters, userinterfaces, and central collection functionality, comprising: a lineside which receives electrical service when connected to said meter; aload side, downstream from said meter line side, which electricallyconnects with an electrical load when connected to said meter; adetection circuit, upstream from said meter load side and downstreamfrom said meter line side, for detecting the presence of electricity atsaid meter load side; a remote disconnect switch, upstream from saiddetection circuit and downstream from said meter line side, controllablyactuated for electrically connecting and disconnecting said meter lineside relative to said meter load side, so that electrical service whenpresent at said meter line side is, respectively, electrically connectedwith, and disconnected from, an electrical load when present at saidmeter load side; metrology, downstream from said meter line side andupstream from said meter load side, for monitoring the consumption orproduction of electricity vis-à-vis electrical service and electricalload associated with said meter; and a bidirectional communicationslink, linking said meter and a network operating relative to an advancedmetering system, such that data may be communicated regarding actuationof said remote disconnect switch and presence of electricity at saidmeter load side.
 2. An electricity meter as in claim 1, wherein: saiddetection circuit comprises a voltage sensor electrically in parallelwith said meter load side; and said metrology includes currentacquisition circuitry for receiving electrical service current signals,and voltage acquisition circuitry for receiving electrical servicevoltage signals.
 3. An electricity meter as in claim 2, wherein: saiddetection circuit includes a filtering capacitor, an over-currentprotection resistor, an opto-isolator, and a transient voltagesuppressor for setting the turn-on voltage of said voltage sensor; andsaid current acquisition circuitry and said voltage acquisitioncircuitry are configured for receiving multi-phase electrical servicecurrent and voltage signals, respectively.
 4. An electricity meter as inclaim 1, wherein said bidirectional communications link includes atleast one communications module configured to effect bi-directionalcommunications between said meter and other networked devices using anopen standard meter communication protocol.
 5. An electricity meter asin claim 4, wherein said at least one communications module includes oneof an additional circuit board dedicated to WAN connectivity and one ormore of GPRS, Ethernet, and RF LAN communications modules.
 6. Anelectricity meter as in claim 1, wherein said metrology is configuredfor correction of any monitoring offset relative to electrical servicecaused by the presence of said detection circuit.
 7. A methodology forimproved functionality of an electricity meter used within an advancedmetering system having and operating relative to a network, othermeters, user interfaces, and central collection functionality,comprising: providing an electricity meter having: a line side forreceiving electrical service; a load side, downstream from the meterline side, for electrically connecting with an electrical load; adetection circuit, upstream from the meter load side and downstream fromthe meter line side, for detecting the presence of electricity at themeter load side; a remote disconnect switch, upstream from the detectioncircuit and downstream from the meter line side, for controllablyactuating for electrically connecting and disconnecting the meter lineside relative to the meter load side, so that electrical service whenpresent at the meter line side is, respectively, electrically connectedwith, and disconnected from, an electrical load when present at themeter load side; metrology, downstream from the meter line side andupstream from the meter load side, for monitoring the consumption orproduction of electricity vis-à-vis electrical service and electricalload associated with the meter; and a bidirectional communications link,linking the meter and a network operating relative to an advancedmetering system; connecting electrical service to the meter line side;and connecting an electrical load to the meter load side, such that datamay be communicated across the network regarding actuation of the remotedisconnect switch and presence of electricity at the meter load side. 8.A methodology as in claim 7, further comprising: actuating the remotedisconnect switch so as to electrically disconnect the meter line siderelative to the meter load side; and subsequently verifying that theremote disconnect switch electrically disconnected the meter line siderelative to the meter load side.
 9. A methodology as in claim 8, furthercomprising: subsequent to verifying that the remote disconnect switchelectrically disconnected the meter line side relative to the meter loadside, actuating the remote disconnect switch so as to electricallyre-connect the meter line side relative to the meter load side.
 10. Amethodology as in claim 7, further comprising: actuating the remotedisconnect switch so as to electrically connect the meter line siderelative to the meter load side; and subsequently verifying that theremote disconnect switch electrically connected the meter line siderelative to the meter load side.
 11. A methodology as in claim 7,further comprising: actuating the remote disconnect switch so as toelectrically disconnect the meter line side relative to the meter loadside; and subsequently identifying possible user fraud by verifying thepresence of electricity at the meter load side.
 12. A methodology as inclaim 7, further comprising: actuating the remote disconnect switch soas to electrically disconnect the meter line side relative to the meterload side; subsequently determining whether the presence of electricityhas been detected at the meter load side; and if the presence ofelectricity has been detected at the meter load side, determiningwhether the phase angle of the line side voltage is the same as that ofthe load side voltage, so as to determine whether the source ofelectricity detected at the meter load side is different from that forthe electrical service connected to the meter line side.
 13. Amethodology as in claim 7, wherein the detection circuit comprises avoltage sensor electrically in parallel with the meter load side, suchdetection circuit including a filtering capacitor, an over-currentprotection resistor, an opto-isolator, and a transient voltagesuppressor for setting the turn-on voltage of the voltage sensor.
 14. Amethodology as in claim 7, wherein the metrology includes currentacquisition circuitry for receiving electrical service current signals,and voltage acquisition circuitry for receiving electrical servicevoltage signals, with such current acquisition circuitry and voltageacquisition circuitry configured for receiving multi-phase electricalservice current and voltage signals, respectively.
 15. A methodology asin claim 7, wherein the bidirectional communications link includes atleast one communications module configured to effect bi-directionalcommunications between the meter and other networked devices using anopen standard meter communication protocol, with such at least onecommunications module including an additional circuit board dedicated toWAN connectivity, or one or more of GPRS, Ethernet, and RF LANcommunications modules.
 16. A methodology as in claim 7, wherein themetrology is configured for correction of any monitoring offset relativeto electrical service caused by the presence of the detection circuit.17. Methodology for an advanced metering system with added functionalitybased on meter load side sensing, comprising: providing a plurality ofend devices, at least some of which end devices comprise electricitymeters, each of such electricity meters having a line side for receivingelectrical service; a load side, downstream from the meter line side,for electrically connecting with an electrical load; a detectioncircuit, upstream from the meter load side and downstream from the meterline side, for detecting the presence of electricity at the meter loadside; a remote disconnect switch, upstream from the detection circuitand downstream from the meter line side, for controllably actuating forelectrically connecting and disconnecting the meter line side relativeto the meter load side, so that electrical service when present at themeter line side is, respectively, electrically connected with, anddisconnected from, an electrical load when present at the meter loadside; and metrology, downstream from the meter line side and upstreamfrom the meter load side, for monitoring the consumption or productionof electricity vis-à-vis electrical service and electrical loadassociated with the meter; providing a network including centralcollection functionality; configuring the network for bi-directionalcommunications between the central collection functionality and each ofthe plurality of end devices; connecting electrical service to the meterline side of at least one of such electricity meters; and connecting anelectrical load to the meter load side of such at least one electricitymeter, such that data may be communicated across the network regardingactuation of the remote disconnect switch thereof and presence ofelectricity at the meter load side thereof.
 18. Methodology as in claim17, said method further comprises: configuring selected of the pluralityof end devices to relay bi-directional communications between thecentral collection functionality and others of the plurality of enddevices; and wherein establishing a network further includes: providingat least one cell relay; and configuring the network such thatbi-directional communication between the central collectionfunctionality and selected of the plurality of end devices passesthrough the at least one cell relay; whereby bi-directionalcommunication between the central collection functionality and selectedof the plurality of end devices is conducted by way of the cell relaywhile bi-directional communication between the central collectionfunctionality and others of the plurality of end devices is conducteddirectly; and wherein configuring the network for bi-directionalcommunications includes using an open standard meter communicationprotocol.
 19. Methodology as in claim 17, further comprising: actuatingthe remote disconnect switch of an electricity meter so as toelectrically disconnect or connect the meter line side relative to themeter load side; and subsequently verifying, respectively, that theremote disconnect switch electrically disconnected or connected themeter line side relative to the meter load side.
 20. Methodology as inclaim 17, further comprising: actuating the remote disconnect switch ofan electricity meter so as to electrically disconnect the meter lineside relative to the meter load side; and subsequently identifyingpossible user fraud by verifying the presence of electricity at themeter load side.
 21. Methodology as in claim 17, further comprising:actuating the remote disconnect switch of an electricity meter so as toelectrically disconnect the meter line side relative to the meter loadside; subsequently determining whether the presence of electricity hasbeen detected at the meter load side; and if the presence of electricityhas been detected at the meter load side, determining whether the phaseangle of the line side voltage is the same as that of the load sidevoltage, so as to determine whether the source of electricity detectedat the meter load side is different from that for the electrical serviceconnected to the meter line side.
 22. Methodology as in claim 17,wherein: each detection circuit of an electricity meter comprises avoltage sensor electrically in parallel with the meter load side, suchdetection circuit including a filtering capacitor, an over-currentprotection resistor, an opto-isolator, and a transient voltagesuppressor for setting the turn-on voltage of the voltage sensor; themetrology of each electricity meter includes current acquisitioncircuitry for receiving electrical service current signals, and voltageacquisition circuitry for receiving electrical service voltage signals,with such current acquisition circuitry and voltage acquisitioncircuitry configured for receiving multi-phase electrical servicecurrent and voltage signals, respectively, and such metrology isconfigured for correction of any monitoring offset relative toelectrical service caused by the presence of the detection circuit insuch electricity meter; and each electricity meter includes at least onecommunications module configured to effect bi-directional communicationsbetween the meter and other networked devices using an open standardmeter communication protocol, with such at least one communicationsmodule including an additional circuit board dedicated to WANconnectivity, or one or more of GPRS, Ethernet, and RF LANcommunications modules.
 23. An advanced metering system with addedfunctionality based on meter load side sensing, comprising: a pluralityof end devices, at least some of which end devices comprise electricitymeters, each of such electricity meters having a line side for receivingelectrical service; a load side, downstream from the meter line side,for electrically connecting with an electrical load; a detectioncircuit, upstream from the meter load side and downstream from the meterline side, for detecting the presence of electricity at the meter loadside; a remote disconnect switch, upstream from the detection circuitand downstream from the meter line side, for controllably actuating forelectrically connecting and disconnecting the meter line side relativeto the meter load side, so that electrical service when present at themeter line side is, respectively, electrically connected with, anddisconnected from, an electrical load when present at the meter loadside; and metrology, downstream from the meter line side and upstreamfrom the meter load side, for monitoring the consumption or productionof electricity vis-à-vis electrical service and electrical loadassociated with the meter; a network including central collectionfunctionality, and configured for bi-directional communications betweenthe central collection functionality and each of said plurality of enddevices, such that data may be communicated across said networkregarding actuation of the remote disconnect switch of an electricitymeter and presence of electricity at the meter load side thereof.
 24. Anadvanced metering system as in claim 23, wherein: selected of saidplurality of end devices are configured to relay bi-directionalcommunications between the central collection functionality and othersof said plurality of end devices; and wherein said network furtherincludes at least one cell relay, with said bi-directional communicationbetween the central collection functionality and selected of saidplurality of end devices passing through the at least one cell relay,whereby bi-directional communication between the central collectionfunctionality and selected of said plurality of end devices is conductedby way of the cell relay while bi-directional communication between thecentral collection functionality and others of the plurality of enddevices is conducted directly; and wherein said network is configuredfor bi-directional communications includes using an open standard metercommunication protocol.
 25. An advanced metering system as in claim 23,wherein: each detection circuit of an electricity meter comprises avoltage sensor electrically in parallel with the meter load side, saiddetection circuit including a filtering capacitor, an over-currentprotection resistor, an opto-isolator, and a transient voltagesuppressor for setting the turn-on voltage of the voltage sensor; themetrology of each electricity meter includes current acquisitioncircuitry for receiving electrical service current signals, and voltageacquisition circuitry for receiving electrical service voltage signals,with such current acquisition circuitry and voltage acquisitioncircuitry configured for receiving multi-phase electrical servicecurrent and voltage signals, respectively, and such metrology isconfigured for correction of any monitoring offset relative toelectrical service caused by the presence of the detection circuit insuch electricity meter; and each electricity meter includes at least onecommunications module configured to effect bi-directional communicationsbetween the meter and other networked devices using an open standardmeter communication protocol, with such at least one communicationsmodule including an additional circuit board dedicated to WANconnectivity, or one or more of GPRS, Ethernet, and RF LANcommunications modules.